Thanks for showing all 3 screens when giving us time to figure the answer. Using smart gauges makes me forget how to derive the correct answer so I really enjoyed this one! Thank you
I want to thank you for what I have learned from your videos, I have bought one of your books and I will order the next one as well.. everything is fine, thank you
Been watching your videos for some time. They are really informative. I am going to order that manual and chart set you offer. Videos are great but print is better!
Great Video. I'm learning Refrigeration and I want to become Refrigeration Technician ? Which book Refrigeration you can recommend for me ? I'm new to HVAC-R ? Thank you for your help.
Good day sir..i just want to ask how about in multi system unit? Example 5 unit with 2hp indoor capacity with EEV.. how to get the super heat and subcool? Thank you so much
Hello Craig, i have a question i went to service this system that had a high pressure of 578 psi in the high side and on the low side 164 psi 43 of superheat and 3 of subcooling it had a piston honestly i couldn't figure out what was wrong because it was not cooling at all
If the total superheat does hit zero and liquid refrigerant does enter the condensing unit, does not the accumulator protect the compressor from that liquid entering the compressor? You, as the technician, might not be onsite to fix that issue and the system should protect itself until it’s fixed, right?
Thanks for the video Craig! I have a surge question. Is it better to use a voltage monitor like KoolGuard2 or just surge like ICM 495 on a minisplit? Basically is it better for the components to run in occasional undervoltage or cutting power during operation at those times?
Excellent video. My English is not good enough, and I need to understand what and where is the outdoor dry bulb and indoor wet bulb; someone can explain to me? They are the sensors that capture the air temperature? Thanks.
Dry bulb temperature is what most people think of when they say temperature. It is what most temperature sensors or gauges show. It is literally a temperature reading given by a thermostat with a dry sensor. Wet bulb temperature takes humidity into account, its name comes from the temperature given by a thermostat that has a soaking wet rag of room temp on the sensor. You want the dry bulb temperature of the air entering the condenser but the wet bulb temperature of the air entering the evaporator. The evaporator will also remove humidity in the air so you must know the temperature adjusted with humidity. Higher humidity will increase the heat load on the evaporator because some energy is used to condense the humidity in the air and not towards cooling the air. The condenser is at a higher temperature therefore moisture in the air will not condense onto it, so the humidity does not have a significant impact on the condenser.
Since Mexican HVAC techs in Mexico do not evacuate, is it safe to assume the refrigerant is contaminated? I've been told that they don't reclaim and I know they don't evacuate...they just let some refrigerant out to purge. I've watched reclaim videos but it's useless if it's contaminated right?
Ha ha yeah may want to check that first! I will have a new vid coming out in a couple weeks on measuring airflow with the trueflow grid. we want to make sure we have proper airflow across the indoor coil!
I live in Cabo San Lucas, Mexico. These techs do not evacuate and simply pump in some refrigerant and ask if the indoor mini-split unit is cooling. Do I need Fieldpiece SM380V SMAN manifolds $549.10 or Mechanical Manifold Gauge Set, 2-Valve $94? All the Americans are being taken to the cleaners by HVAC techs. The last guy didn't even look for leaks, tighten anything.... just simply dumped in refrigerant, took my money and split.
Why does every one leave out STEP ONE???? Verify if there is a TXV before you even get the gauges out of the truck! I suggest using the supercoolsliderule for charging. Dead nuts simple, no more guessing.
Wtf are you talking about? There are so many ways to verify ac charge. Gauges or not. Superheat and subcooling is actually always present. You can measure delta T,suction or line temp.
As always I like to watch your videos no matter of how busy or tired I am.Thanks for sharing.
Almost done with hvac school, and my instructor recommended this channel, thanks from san diego
Thats so awesome and thanks for taking time to write this note! what school if you dont mind me asking?
@AC Service Tech LLC San diego College continuing education
Thanks for showing all 3 screens when giving us time to figure the answer. Using smart gauges makes me forget how to derive the correct answer so I really enjoyed this one! Thank you
🎉🎉🎉 Super clear explanation, thank you so much, Sir.
I want to thank you for what I have learned from your videos, I have bought one of your books and I will order the next one as well.. everything is fine, thank you
I'm a new student. Thanks for the excellent video!
You're very welcome!
Been watching your videos for some time. They are really informative. I am going to order that manual and chart set you offer. Videos are great but print is better!
Awesome video. Love the interaction segment.
@JD Kelly StudentofHVAC I really like your quick tips that you post!!
Awesome video Craig it’s crazy how much more I have learned on your channel than school. Thank you keep up the great work
More like this one !!!
Damn I Love Your Videos. Thanks In Advance!
Thank you so much
You're most welcome
Great video
Do we use the same chart for target superheat for everything? Or is it specific to each refrigerant, or specific to each unit?
Can i use this method in VRF system ?
When are they going to release the mini split book in Spanish?
We have released our book in Spanish! Pick it up on our website! www.acservicetech.com/libro-minisplit-en-espanol
@@acservicetechchannel thank you 🙏
Most residential systems I work on these days have TXVs or EEVs. Is the industry going back to pistons and cap tubes?
Excellent as usual Craig!
Question.. what is the best/accurate leak detector in the field??
Is it electric or halide
Status, hands down!
@@scottbig123 Static?.. so electric?
Great Video. I'm learning Refrigeration and I want to become Refrigeration Technician ? Which book Refrigeration you can recommend for me ? I'm new to HVAC-R ? Thank you for your help.
Good day sir..i just want to ask how about in multi system unit? Example 5 unit with 2hp indoor capacity with EEV.. how to get the super heat and subcool? Thank you so much
Hello Craig, i have a question i went to service this system that had a high pressure of 578 psi in the high side and on the low side 164 psi 43 of superheat and 3 of subcooling it had a piston honestly i couldn't figure out what was wrong because it was not cooling at all
If the total superheat does hit zero and liquid refrigerant does enter the condensing unit, does not the accumulator protect the compressor from that liquid entering the compressor? You, as the technician, might not be onsite to fix that issue and the system should protect itself until it’s fixed, right?
If it has an accumulator
Many do not have a accumulator
@@1MNUTZ you are correct.
Thanks for the video Craig! I have a surge question. Is it better to use a voltage monitor like KoolGuard2 or just surge like ICM 495 on a minisplit? Basically is it better for the components to run in occasional undervoltage or cutting power during operation at those times?
No tiene subtitulos en español?
Excellent video. My English is not good enough, and I need to understand what and where is the outdoor dry bulb and indoor wet bulb; someone can explain to me? They are the sensors that capture the air temperature? Thanks.
outdoor dry bulb- air entering condenser coil
indoor wet bulb- air entering return grille (must have thermometer that reads wb)
@@handymanbrian8269 thank you
Dry bulb temperature is what most people think of when they say temperature. It is what most temperature sensors or gauges show. It is literally a temperature reading given by a thermostat with a dry sensor. Wet bulb temperature takes humidity into account, its name comes from the temperature given by a thermostat that has a soaking wet rag of room temp on the sensor.
You want the dry bulb temperature of the air entering the condenser but the wet bulb temperature of the air entering the evaporator. The evaporator will also remove humidity in the air so you must know the temperature adjusted with humidity. Higher humidity will increase the heat load on the evaporator because some energy is used to condense the humidity in the air and not towards cooling the air. The condenser is at a higher temperature therefore moisture in the air will not condense onto it, so the humidity does not have a significant impact on the condenser.
Somebody told me: you need to check refrigerant level every year because if level is too low compressor might burn out. Is it correct ? Thanks
Since Mexican HVAC techs in Mexico do not evacuate, is it safe to assume the refrigerant is contaminated? I've been told that they don't reclaim and I know they don't evacuate...they just let some refrigerant out to purge. I've watched reclaim videos but it's useless if it's contaminated right?
Make sure the indoor and out door coils clean and indoor air filter is clean before getting SH reading. Don’t ask me how I know this. 😂😂😂😂.
Ha ha yeah may want to check that first! I will have a new vid coming out in a couple weeks on measuring airflow with the trueflow grid. we want to make sure we have proper airflow across the indoor coil!
I live in Cabo San Lucas, Mexico. These techs do not evacuate and simply pump in some refrigerant and ask if the indoor mini-split unit is cooling. Do I need Fieldpiece SM380V SMAN manifolds
$549.10 or Mechanical Manifold Gauge Set, 2-Valve $94? All the Americans are being taken to the cleaners by HVAC techs. The last guy didn't even look for leaks, tighten anything.... just simply dumped in refrigerant, took my money and split.
Why does every one leave out STEP ONE???? Verify if there is a TXV before you even get the gauges out of the truck! I suggest using the supercoolsliderule for charging. Dead nuts simple, no more guessing.
Wtf are you talking about? There are so many ways to verify ac charge. Gauges or not. Superheat and subcooling is actually always present. You can measure delta T,suction or line temp.
@@5822huron Yes you can, but I wanna know what I'm working with. There still is a lot of old junk out there running without txv's in them.
@worldtraveler keep pushing
Knowing your metering device is a crucial step.
@@d3adp94 Thankyou! I've been saying this for years and everyone looks at me weird!